111221749913 has 2 divisors, whose sum is σ = 111221749914. Its totient is φ = 111221749912.

The previous prime is 111221749907. The next prime is 111221749927. The reversal of 111221749913 is 319947122111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104411704384 + 6810045529 = 323128^2 + 82523^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221749913 - 2¹⁶ = 111221684377 is a prime.

It is not a weakly prime, because it can be changed into another prime (111221749213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610874956 + 55610874957.

It is an arithmetic number, because the mean of its divisors is an integer number (55610874957).

Almost surely, 2^111221749913 is an apocalyptic number.

It is an amenable number.

111221749913 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221749913 is an equidigital number, since it uses as much as digits as its factorization.

111221749913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The spelling of 111221749913 in words is "one hundred eleven billion, two hundred twenty-one million, seven hundred forty-nine thousand, nine hundred thirteen".